I've also taken my bike on a plane sans box. Got two bikes to Aix and back without any incident. CTC recommended plastic bike bags are what I used.
http://www.wiggle.co.uk/ctc-plastic-bike-bag/?lang=en&curr=GBP&dest=1&utm_source=google&utm_medium=cpc&utm_campaign=Dynamic+Search+Ads+Cycle&referid=googwig&gclid=CNrezuTJ_rwCFanjwgodaTYAoQ
@sorethroat started
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I've also taken my bike on a plane sans box.
Got two bikes to Aix and back without any incident.
CTC recommended plastic bike bags are what I used.
http://www.wiggle.co.uk/ctc-plastic-bike-bag/?lang=en&curr=GBP&dest=1&utm_source=google&utm_medium=cpc&utm_campaign=Dynamic+Search+Ads+Cycle&referid=googwig&gclid=CNrezuTJ_rwCFanjwgodaTYAoQ